Machinery for covering wire with insulating material



(No Model.)

H. A CLARK. Machinery for Covering Wire with Insulating Material. No.242,884 Patented June 14,1881.

UNITED STATES PATENT OFFICE.

HENRY A. CLARK, OF BOSTON, MASSACHUSETTS.

MACHINERY FOR COVERING WlRE WITH INSULATING MATERIAL.

SPECIFICATION forming part of Letters Patent No. 242,884, dated June 14,1881.

Application filed February 1,1881. (No model.)

To all whom it may concern Be it known that I, HENRY A. CLARK, ofBoston, in the county of Suffolk and State of Massachusetts, haveinvented certain new and useful Improvements in Machinery for Cover ingWire with Insulating Material, of which the following is a full, clear,and exact description.

This invention relates more particularly to H1 achines adapted for thecovering of telegraph or telephone wire with an insulating material as,for instance, indie-rubber or gutta-percha, or restored waste vulcanizedindie-rubber or gutta-percha, in any of their vulcanizable or othercompounds-and to that class of such machines as are constructed andarranged forthepassage and guiding of wire axially through a circularopening in a die or head block, and for the forcing at the same time ofthe material with which the wireis to be coated through the samedie-opening in a manner to dispose and place such coating material aboutand around the wire; and as an illustration of this class of machinesreference is hereby had to the schedule annexed to and making a part ofthe Letters Patent of the United States issued to Thomas Sault, datedDecember 9, 1862, No. 37,112; and the object of this invention moreespecially is to adapt such machines for their application of suchcoating material to wires previously coated with a material or materialsof a nature or formation to yield or give either in their thickness orlength, or both, to the pressure thereon under the operation of themachine to force and apply the coating to such wire as they togetherpass through the circular die-opening; and to that end it consists of aguide for the wire which at and along its end at which the wire escapesandpasses therefrom into the die-opening has exterior parallel sides, orsides substantially parallel, in combination with a die-opening which,for a part of its length, has parallel sides, or sides substantiallyparallel, when the former is so located in reference to the saiddie-opening that its said parallel, or substantiallyparallel, sides,either for the whole or for a part of theirlength, shall project and liewithin the said die-opening at and along its said parallel sides, orsubstantially parallel sides, either for the whole or a part of theirlength, substantially as hereinafter described.

1n the accompanying plate of drawings this invention is illustrated asapplied in two ways in relation to the forcing. of the coating materialthrough'the die-opening and to the guiding of the wire to be coated,which ways consist, in the one instance, of locating such parts in linesat right angles to each other, and in the other instance in linesparallel with each other.

Figures 1 and 6 are central longitudinal sections, respectively, of themachine arranged in the two ways stated. Fig. 2 is a transverse sectionon line 2 2 of Fig. 1; and Fig. 3, a transverse section, enlarged, online 3 3 of Fig. 1

as running at right angles to the length of the screw B and cylinder A,and in Fig. Gasloosely within the screw; and E, the die-block, whichaxially is coincident with the axial line of the wire-guide D, severallyarranged for the passage of a wire through the die-openin g, and atthesame time for the forcing of a coating material through thedie-opening as the wire passes through the same, all substantially(except as hereinafter described) the same as in the schedule annexed tothe Letters Patent hereinbefore referred to.

The guide for the wire at and along its end at which the wire escapes orpasses therefrom to the die-openin g a is made with exterior parallelsides, or sides substantially parallel, and such portion of the saidguide enters and projects either for the whole or a partof its lengthinto the die-openin g a, which die-opening, either for the whole or apart of its length correspend-in g therewith, is similarly provided withof the guide D for the wire and the die-openin g a under the operationof the apparatus to force the coating through the die-opening as thewire proceeds through the same gives direction to such coating materialin the line along which it is intended to and should pass through thedie-opening before it reaches and comes in contact with the wire whichit is to coat, and thus it is prevented from working itself in abackward direction upon the wire, which obviously is most advantageousif the wire should have been previously covered with a coating orcoatings of materials which are of a nature capable of compression intheir thickness or of extension or movement in their lengtl1as, forinstance, a wire previously coated with insulating material, eitheralone or in combination with a strip of tin-foil exteriorly coveringsaid insulated wire.

The construction of the guide-tube and die employed by me to accomplishthe results hereinbefore specified differs from the form of guidetubeand diein those machines now in use which employ a guide-tube, S, and adie, '1, of the form shown in the sectional view, Fig. 7, of thedrawings, which particular form is not claimed by me.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

In a machine of the class herein described, the wire-guide D, havingparallel sides, and the opening a in die-block E, having similarparallel sides, I) I), arranged and combined to-.

